Organically templated (3,8)-connected microporous heterometallic Zn(II)–Sr(II) coordination polymer

This communication describes a new (3,8)-connected microporous heterometallic coordination polymer, [Zn2Sr(pbdc)3(μ2-O1w)2(DMF)]n·n(DMF) (1 H2pbdc = terephthalic acid, DMF = N,N′-dimethylformamide). Crystallographical analysis reveals that it features an unusual heterometallic trinuclear building unit [Zn2Sr(COO)4(μ2-OH2)]. These trinuclear clusters are further interconnected by pbdc ligands, giving rise to the final three-dimensional (3D) microporous framework. In 1, DMF molecules not only act as terminal ligands but also act as templates filling in the one-dimensional (1D) channel further consolidating the whole framework. Moreover, this compound also exhibits strong ligand-centered violet luminescence at room temperature in the solid state.